8014323: Add VariableTree.getNameExpression

Reviewed-by: darcy

src/share/classes/com/sun/source/tree/VariableTree.java

@@ -33,6 +33,7 @@ import javax.lang.model.element.Name;
  * For example:
  * <pre>
  *   <em>modifiers</em> <em>type</em> <em>name</em> <em>initializer</em> ;
+ *   <em>modifiers</em> <em>type</em> <em>qualified-name</em>.this
  * </pre>
  *
  * @jls sections 8.3 and 14.4
@@ -45,6 +46,7 @@ import javax.lang.model.element.Name;
 public interface VariableTree extends StatementTree {
     ModifiersTree getModifiers();
     Name getName();
+    ExpressionTree getNameExpression();
     Tree getType();
     ExpressionTree getInitializer();
 }

src/share/classes/com/sun/source/util/TreeScanner.java

@@ -149,6 +149,7 @@ public class TreeScanner<R,P> implements TreeVisitor<R,P> {
     public R visitVariable(VariableTree node, P p) {
         R r = scan(node.getModifiers(), p);
         r = scanAndReduce(node.getType(), p, r);
+        r = scanAndReduce(node.getNameExpression(), p, r);
         r = scanAndReduce(node.getInitializer(), p, r);
         return r;
     }

test/tools/javac/tree/SourceTreeScannerTest.java

@@ -36,7 +36,6 @@
 /*
  * @test
  * @bug 6923080
- * @ignore 8014323: Add VariableTree.getNameExpression
  * @summary TreeScanner.visitNewClass should scan tree.typeargs
  * @build AbstractTreeScannerTest SourceTreeScannerTest
  * @run main SourceTreeScannerTest -q -r .